ReadSync vs Eclipse
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
ReadSync
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ReadSync remembers where you stopped reading โ on every device. Open a PDF on your Mac, read to page 120, then pick up your iPhone. ReadSync opens the same document on the same page. Your highlights, notes and bookmarks are already there. WHY READSYNC โข Your reading position syncs automatically through iCloud โ in the free version too โข No account to create, no subscription, no company server holding your files โข Works completely offline โ syncing is a layer on top, never a requirement PICK UP WHERE YOU LEFT OFF โข A Continue Reading row at the top of your library, most recent first โข A Home Screen widget that opens the document on the page you left โข Nothing to press: the page is saved as you read and travels with you READING โข A quiet reader that hides its controls while you read โข Night mode that darkens the page without draining the colour from your highlights โข Single or two-page layout, vertical or horizontal scrolling โข Adjustable default zoom โข Translate any passage you select into your own language, on your device with Apple's built-in translation HIGHLIGHTS AND NOTES โข Five highlight colours โข Attach a note to any passage โข Every highlight and note in one list โ tap to jump straight to the page โข Export everything from a document as a single file, to Notes, Mail or Files โข Nothing is written into the PDF itself; your original file stays untouched FINDING YOUR PLACE โข Full-text search inside the document โข The PDF's own table of contents โข Bookmarks for the pages you want to come back to YOUR LIBRARY โข Add files from Files or iCloud Drive โข Leave a file where it is, or copy it into ReadSync so it syncs across your devices โข Cover, progress and page count at a glance โข Sort by last read, title or date added READING STATS โข Total reading time, and how much of it was this week โข A chart of the last seven days โข Progress for every document you have started FREE AND PRO The free version is a whole reader, not a demo: iCloud sync, night mode, search, table of contents, bookmarks, translation and all five highlight colours, with room for 5 documents and 10 highlights or notes in each one. ReadSync Pro lifts both limits and opens reading stats, note export and the widget. It is a one-time purchase โ there is no subscription. A limit only ever stops you adding something new. Everything already in your library stays open, in full, whether you buy or not. PRIVACY ReadSync is built entirely with Apple's own frameworks and stores everything in your private iCloud database. Your documents are never uploaded to anyone else's server. Anonymous usage statistics are sent only if you agree when asked, and never include your files, page contents, notes or highlights.
Eclipse
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Hate reading PDFs at night? So did we. Eclipse is the dark mode PDF reader your eyes have been waiting for. One tap transforms any PDF into a beautiful, eye-friendly dark document โ no more blinding white backgrounds in bed, on the couch, or during late-night study sessions. TRUE DARK MODE โ NOT A FILTER Most apps just dim your screen. Eclipse is different. Our smart color inversion engine flips the actual content โ white becomes black, black becomes white โ giving you a true OLED-friendly dark reading experience that saves battery and protects your eyes. Choose from three reading themes: โ Pure Dark โ Full inversion, maximum contrast, perfect for OLED โ Warm Dark โ Soft tones for relaxed reading (Pro) โ Sepia โ Paper-like warmth for long sessions (Pro) ANNOTATE & MARK UP YOUR DOCUMENTS Eclipse isn't just a viewer โ it's your complete PDF workspace: โ Highlight text with a translucent highlighter โ Draw freehand with pen, marker, or highlighter tools โ Pick from multiple colors and adjust line thickness โ Undo strokes and erase individual annotations โ All changes are saved directly to the PDF file SMART READING FEATURES โ Bookmark any page with a custom title โ Full-text search across your entire document โ Go-to-page navigation for quick access โ Reading progress bar with page tracking โ Continue Reading โ pick up exactly where you left off โ Screen brightness control built right in โ Share PDFs directly from the reader YOUR LIBRARY, ORGANIZED โ Import PDFs from Files, iCloud, email, or any app โ Thumbnail previews for every document โ Search your library by file name โ Delete documents with a long-press โ Clean, elegant interface โ no clutter, no distractions 100% PRIVATE. ALWAYS. Your PDFs never leave your device. No cloud uploads. No servers. No analytics. No tracking. Everything happens on-device. We can't see your documents even if we wanted to. FREE TO USE โ PRO FOR POWER READERS Eclipse is free with Pure Dark mode. Upgrade to Eclipse Pro to unlock Warm Dark & Sepia themes, bookmarks, and annotation tools. โ Monthly: $1.99/month โ Lifetime: $4.99 โ one-time, forever No ads. No data collection. Just reading, the way it should be. Download Eclipse today and never read a blinding white PDF again. Terms of Use: https://burakani.github.io/eclipse-legal/terms.html Privacy Policy: https://burakani.github.io/eclipse-legal/privacy.html
Screenshots
Verdict
The clearest difference is device support: ReadSync at 3 against Eclipse's โ. On price, in-app purchases and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. ReadSync sells 1 one-off in-app purchase and Eclipse sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | ReadSync | Eclipse |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | โ |
| Ads | No | โ |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Mac โ better | โ |
| Requires iOS | 18.0 | 17.0 โ better |
| Further details โ not scored | ||
| Size | 4 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Alper Albayrak | Burak ANI |
In-app purchases
ReadSync
- Unlock Pro$19.99
Eclipse
- Monthly Premium$1.991 Month
- Lifetime Premium$4.99









